A Shelby 427 Competition Cobra, billed as the winningest Cobra ... The bigger, more powerful engine required a redesigned chassis, and the bodywork was also modified with larger fender flares ...
For 1973, renowned Ford engine tuner Al Joniec, of Batmobile Mustang Funny Car fame, managed to extract a legal 670 hp from the original 427, and the Cobra was back in the winning business.